Swivel chair base



May 17, 1949. E. s. HARTER SWIVEL CHAIR BASE Filed Marh 19, 1948 INVENTOR. [VJ/7 J. flaw/6W Egg I III Patented May 17, 1949 Evan Si-Harter; Sturgis, Michi', assigrmr t'o flatter; Gorporationy Sturgis, Mich a corporatlon off' Michigan- Applicalfidn March, 19, 1948 SeriaL N0..-15,7,71l

12 Glaims: 1i This invention relates, to improvements .in. base 0rpedestal for swivel ch-airs,

The main objects, ot gthistinuention are z.

First, to provide abase .01:.pedestaliorlswivelairs which maybe veryeconomically .produced,

is lien in w i ht andatthe same. timestron and Secondto providea base or pedestal, forswivel. chairs which; is formed got ;relatively few" parts peartfrom the description to. follow. The invention is pointed. out. in the .,cl aims. A preferred;

embodiment of. the apparatllsfor carrying out the},

method o he invention...is.,clear1y .illustratedtinl the accompanying drawing inwhichz,

Fig. 1 is afraementarv. elevationaLview partially in vertical: sectionoonuailine corresponding--. to l'i of Fig. 2,;portionswofa chair. seat and its spindle being, indicated...by dotted; lines to show the relationship .of. thepartsn Fig. 2' is an invertedview of..the baseioropedes tal with the caster wheels. anditheirsockets ire-- moved.

Fig, 3 isanenlareed fragmen arygview in secr,

tion on aline c.orrespondingfjio.line3-3 of Fig. 2.-. i ,v is...aperspective view. of one: of the;

u -shaped 1eg. members;

Fi'g. ,5 is an elevationalview otthe cruciformedy center member.

Fig. 6 is an .enlar edrsectional view on .a-l1ne.. 6-6 of Fig.v 2.;

The. embodiment. of; .mminvention;.illustrated i .1 I

comprises the generally cruciform-center mem-kberJ vformedlas. va..st,an,iping,. theearm portions terminating in tubular end-portions 2. Thecenter member is of, generally, concave-convex: shape;

The side walls or flangesfiubetween the armgporetions are inwardly. curved and emerge into. ether.

arm portions.v of tubular, stock andare-pf-z-U-shape,each-meme,

The lees-members 4 are-formed? ber,consti t1ltihg. a pair of. legs- 5 havingdown-=- turned outer endsufi Theecenterl memberrrl is initially formed with the sides I of its arms projecting downwardly in parallel relationas ,iSzshownrin Fig. 5. The pair of leg members are arranged in. oppositely disposed relation, as shown in Fig. 2,"with thelegs between these flange-like parts I; The flangelike parts liare then bent around the legs 4 to closely; embrace the same and-:the edges ofthe bartsl twelded together anduto...'-the undenasides'; of,.the legs. as. is indicatedhatjiinFigs. 2*and'i6 inthe drawings. These WeIdsaregpreferablygarc: welds.

The tubular spindle socket 9 is arranged through an opening ID in the center member and between the bights of the leg members and secuted thereto bythe-WeldS .14.. The spindle socketi; assalsowelded tonthemtop oflithe center. 1 member... asindicatedl'at, I 2.1. 'lh'isiresults in..a-..very secure. coactin bracing relationship .for. the; spindlei socket,.the center members and! the leg members... 'I'hamDPfir. .end ..of. .themocketmemberis. flanged, outwardly .at -..I 3' .to. provide ..a .bearing for, the nut, member. .s of 'the seamspindle indicated ..by vdotted; lines in the. Fig. 1'. Caster: wheel socketsziithavin i; bead-like flanges Myatstheir. lower endsare. in? sorted in .the. downwardly directed. ends at. the. legs. These provide.a. -finisl=l for. thelouteroendsa of {the legs as. well as ,reinforces therefor and; supports the spindles of the caster wheels 15;.

With thepartsthusranraneedalprovideastructure. which may, be very, economically. produced; is.str,on .and rigid even when. formed of compare: tivelylight materiabandiistattractive inhappears ance...

Ii have not. attempted {10,2 illustrate various, adaptationswhich-I contemnlateiast itis; believed that this disclosure willenable thoseskilled-inthe art to. embody ,or .adaptcmyiinvention as tmay bet desired;

Having .thus...descr hedl.my invention, what. i I. claim as. new andtdesirettosecurelby Letters Pat- I. entLis:

1. Achair. baseuoripedestalcomprising a crucia form. .center. member z0f ..genera11y rconcavo-convex shape; facing-i downwardly-and. having in."- wardly, curved .sideWallmbetWeen the arms-there 012. a pair; offloppositelyl, disposed. tubular. .U -.shaped leamembers .eachconstituting; arpair of: legs, the outer ends .of they legs-being stunned: downwardly;

said-legmembers lbeing disposediwith their bights 1*,

within, .the side wallstofethe. reenter memberqandrz with their legswithinithe arms thereof, the 22111118,; of. thecenter member bein -{clamped around-.:the=:a

legs..-with the edges-toflthesarms on the under:

sides. thereofand -welded-:togethervand toithee under sides vof :the legs,-: a-tubular spindle SOCkEtf'Z. member. disposed centrally; through the 1', top .of

thecenter member-andrbetween:the\bights of the: leg members .in supported:engagementtherewith-1-:

andtweldeditheretoi the socketmember -being:a1s.o 2

weldedoto lthe-top of the center member; the; upper end :of: the' soeket- .member:beingaflangedit. outwardlytaprov-ide flzSDiIldlB- bearing: element; and castemwheelsocketsm'aving bead-dike flanges s at. ithfiil. lower-*1 endsainserted: in-th'e .downturned endsof-saidzleg. memben-with-their :said. bead-like flanges abutting. the;ends roi the legs-a tsAIchair base omped'estahcomprising a cruciformcenter member ,of: generally ic-oncavoconvex ,shape facing. downweirdly,rand:ahswingginwardly:

cunvedosidetwallssbetweenxthe arms thereof, av pairoi oppositelywdisposed tubularUashaped legs members each constituting a pair of legs, said leg members being disposed with their bights within the side walls of the center member and with their legs within the arms thereof, the arms of the center member being clamped around the legs with the edges of the arms on the under sides thereof and Welded together and to the under sides of the legs, a tubular spindle socket member disposed centrally through the top of the center member and between the bights of the leg members in supported engagement therewith and welded thereto, the socket member being also welded to the top of the center member.

3. A chair base or pedestal comprising a cruciform center member of generally concave-convex shape facing downwardly and having inwardly curved side walls between the arms thereof, a pair or oppositely disposed tubular U-shaped leg members each constituting a pair of legs, the outer ends of the legs being turned downwardly, said leg members being disposed with their bights within the center member and with their legs within the arms thereof which embrace and are welded to the legs, a spindle socket member disposed centrally through the top of the center member and between the bights f the leg members and welded thereto, the socket member being also welded to the top of the center member, and caster wheel sockets having flanges at their lower ends inserted in the downturned ends of said leg member with their said flanges abutting the ends of the legs.

4. A chair base or pedestal comprising a cruciform center member of generally concavo-convex shape facing downwardly and having inwardly curved side walls between the arms thereof, a pair of oppositely disposed tubular U-shaped leg members each constituting a pair of legs, said leg members being disposed with their bights within the center member and with their legs within the arms thereof which embrace and are welded to the legs, a spindle socket member disposed centrally through the top of the center member and between the bights of the leg members and welded thereto, the socket member being also welded to the top of the center member.

5. A chair base or pedestal comprising a cruciform center member of bendable sheet stock, a of oppositely disposed U-shaped leg members each constituting a pair of legs, the bights of the leg members being disposed within said center member, the arms of the center member being disposed to embrace the legs and being welded thereto, and a spindle socket disposed centrally through the top of the center member and between the bights of the leg member and welded thereto and to the top of the center member whereby the leg members constitute bracing and supporting elements for the spindle socket.

6. A chair base or pedestal comprising a cruciform center member having tubular arm portions and inwardly curved flanges between the arm portions merging into said tubular arm portions, U-shaped leg members each constituting a pair of legs disposed with their legs within said arm portions of said center member and fixedly secured therein, and their bight portions within the flanges of said center member, and a spindle socket disposed through the top of the center member and between the bights of the leg members and fixedly secured thereto and to the top member, the leg members constituting supporting and bracing elements for the socket member.

'7. A chair base or pedestal comprising a cruciform center member having tubular arm portions and inwardly curved flanges between the arm portions merging into said tubular arm portions, U-shaped leg members each constituting a pair of legs disposed with their legs within said arm portions of said center member and fixedly secured therein, and their bight portions within the flanges of said center member.

8. A chair base or pedestal comprising a cruciform concavo-convex center member, a pair of oppositely disposed U-shaped leg members each constituting a pair of legs, the bights of the leg members being disposed within said center member with the legs Within the arms of the center member and secured thereon, and a spindle socket disposed centrally through the top of the center member and between the bights of the leg member and secured thereto whereby the leg members constitute bracing and supporting elements for the spindle socket.

9. A chair base or pedestal comprising a cruciform concavo-convex center member, a pair of oppositely disposed U-shaped leg members each constituting a pair of legs, the bights of the leg members being disposed within said center memher with the legs within the arm of the center member and secured thereon.

10. A chair base or pedestal comprising a cruciform center member, U-shaped leg members each constituting a pair of legs disposed and their legs within the arms of said center member and fixedly secured therein, their bight portions within said center member, and a spindle socket disposed through the top of the center member and between the bights of the leg members and fixedly secured thereto and to the top member, the leg members constituting supporting and bracing elements for the socket member.

11. A chair base or pedestal comprising a cruciform center member having downturned side flanges between the arms thereof, a pair of oppositely disposed U-shaped le members each constituting a pair of legs, said leg members being disposed with their bights within the center member and with their legs within the arms thereof with the arms of the center member embracing and fixedly secured to the legs, and a spindle socket member disposed centrally through the top of the center member and between the bights of the leg members and secured thereto, the socket member being also secured to the top of the center member.

12. A chair base or pedestal comprising a cruciform center member having downturned side flanges between the arms thereof, a pair of oppositely disposed U-shaped leg members each constituting a pair of legs, said leg members being disposed with their bights within the center member and with their legs within the arms thereof with the arms of the center member embracing and fixedly secured to the legs.

EVAN S. HARTER.

CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Nurxzber Name Date 2,134,639 McGowen Oct. 25, 1938 2,213,583 Marthaler Oct. 22, 1940 2,295,281 Grunwald Sept. 8, 1942 2,350,399 Jones June 6, 1944 

